Index: src/settings.h
--- src/settings.h.orig
+++ src/settings.h
@@ -13,6 +13,8 @@
 
 #define LIST_END (-1)
 
+enum mouse_button { BTN_LEFT, BTN_RIGHT, BTN_MIDDLE, BTN_TOUCH };
+
 enum alignment { ALIGN_LEFT, ALIGN_CENTER, ALIGN_RIGHT };
 enum vertical_alignment { VERTICAL_TOP, VERTICAL_CENTER, VERTICAL_BOTTOM };
 enum separator_color { SEP_FOREGROUND, SEP_AUTO, SEP_FRAME, SEP_CUSTOM };